1. Are there any external resources that can be used by the damaged component?
Answer: No
2. Is there any foreign material present?
Answer: No
3. Can the repair begin without an external energy resource?
Answer: No
4. Is there a trigger event to begin the repair?
Answer: Yes
5. Does the healing change the characteristics of the system?
Answer: Yes
6. Is the trigger event related to the temperature surrounding the mechanism?
Answer: No
18) Scavenging reactive species. Predatory Mites.
Bdelloid rotifers are resistant to ionizing radiation due to enhanced capacity for scavenging destructive radiation-induced molecules before
they have a chance to cause damage.
Ionizing radiation, including that from nuclear materials and X-rays, can damage DNA and proteins directly by forming or breaking bonds in DNA or indirectly by the formation of reactive oxygen species (ROS). ROS, such as free radicals and peroxides, can destroy proteins. D. [Deinoccocus] radiodurans and bdelloid rotifers are able to survive exposure to ionizing radiation because they are able to scavenge ROS before they can wreak havoc, thereby leaving proteins charged with repairing damaged DNA to do their job.
Rotifers of class Bdelloidea are common invertebrate animals inhabiting temporary freshwater pools, the surfaces of
mosses and lichens, and other ephemerally aquatic habitats. Their success in such habitats depends on their extraordinary ability to survive desiccation at any stage of their life cycle…We propose that the extraordinary resistance of bdelloid rotifers to IR [ionizing radiation], like that of the bacterium Deinococcus radiodurans, is a consequence of evolutionary adaptation to survive desiccation in ephemerally aquatic habitats and that such desiccation causes extensive DNA breakage, which they are able to repair.
AskNature. ÒScavenging reactive species.Ó 14 May 2016. Web. 28 Sept 2017.
https://asknature.org/strategy/scavenging-reactive-species/#.Wc0yrUyZPq0
Recent Comments